Question

Edison who invented light had _________ knowledge of science.

A．a; \

B．a; a

C．the; \

D．the; a

Answer 1

D

考查冠词。第一空应在invented的后面，发明物的前面必须加the，第二空为固定短语：have a knowledge of 精通，句意：发明电灯的爱迪生精通科学。所以选D。